body{
    background: url(../images/1.webp)no-repeat;
    background-size: 100%;
}
.container{
   
    width: 985px;
    height: 552px;
    margin:100px auto;
    position: relative;
}
.row{
    display: flex;
    justify-content: space-between;
}
.item{
    opacity: 0.5;
}
.current{
    opacity: 1;
}
.btn{
    background: url(../images/btn.jpg);
    width: 200px;
    height: 68px;
    font-size: 20px;
    color: azure;
    line-height: 68px;
    text-align: center;
    cursor: pointer;

    position: absolute;
    left: 500px;
    top: 80%;
    transform: translate(-50%,-50%);
}
.header{
    height: 75px;
    overflow: hidden;
}
.header .logo{
    float: left;
    margin-top: 14px;
    height: 44px;
}
.header .nav{
    float: right;
  margin-top:20px;
}
.header .nav li{
    display: inline;
}
.header .nav li a{
    color:black;
    display: inline-block;
    padding-left: 10px;
    line-height: 33px;
    text-decoration: none;
    padding-right: 10px;
}
.header .nav li a:hover{
    font-weight: 700;
    background-color:black;
    border-radius: 32px;
    color: black;
    padding-right: 10px;
    
}